Automatic stoker.



' -G. W. PHILLIP.

v AUTOMATIC sToKER.

APPLICATION FILED NOV. 18, 1910.

. Patented Mar.5,1912.

l il 8 $50,755 h/.IPH/L/H UNITED STATES PATENT OFFICE.Y

GEORGE W. PHILLIP, OF CANTON, NORTI-I CAROLINA, ASSIG-NOR TO MURPHY IRON WORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AUTOMATIC STOKE-R.

Specicaton of Letters Patent.

Patented Mar. 5, 1912.

Application led November 18, 1910. Serial No. 593,029.

To all 'whom t may concern Be it known that I, GEORGE W. PHILLIP, a citizen of the United States of America, residing at Canton, in the county of Haywood and State of North Carolina, have invented certain new and useful Improvements in Automatic Stokers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in automatic stokers and more particularly to that portion thereof which forms the rear end of its magazine, the object of the invention being, the facilitating of the cleaning of the air passages and the repairing of parts exposed to the fire which are liable to be destroyed thereby.

To this end the invention consists in the construction, arrangement and combination of parts, all as hereinafter more fully described, reference being had to the accom panying drawing in which- Figure 1 is a transverse vertical section through a magazine and adjacent parts of an automatic stoker embodying the invention; Fig. 2 is a side elevation of a casting form ing the end of the magazine; Fig. 3 a horizontal section of the same on the line x-m; Fig. 4 a front edge view of Fig. 2; Fig. 5 is a perspective view of said casting with its detachable portion removed; Fig. 6 is a similar view of the detachable portion of the casting; and Fig.v 7 is a longitudinal section through a portion of the magazine and adjacent parts, on the line g/-y of Fig. 1.

For convenience of illustration, this invention is shown embodied in an automatic stoker of an old and well known type, but,

it may be used in other construct-ions in which the end of the magazine is adapted to be formed by a casting.

As shown in the drawing, 1v is a suit-able frame for supporting the rear end of a magazine 2, the outer side wall of which is formed by a plate 8 and the inner wall by an arch plate 4 having seats for arches 5 and 6 which are spaced apart to form an air space or .Hue 7 between them.

The upper side of the discharge throat of the magazine is formed by the seat for the inner arch 5 and the lower side of the throat is formed by a coking plate 8 having an air flue 9 beneath it throughout its length to cool the same. The sides of the liuc 9 are formed by two angle bars 10 and its bottom, by a plate 11 rest-ing upon the inwardly extending horizontal flanges of said bars. Supported with their upper ends resting against an angle bar 12 secured to the coking plate, are inclined grate bars 13, 'and the coal is pushed from the coking plate onto the upper ends of said bars by reciprocable stoker boxes 14 which slide on the plate beneath the inclined bottom plate 15 of the hopper. A rock shaft 16 mounted in bearings upon the supporting frame directly beneath these stoker boxes and extending longitudinally thereof, is provided with segments 17 to engage teeth on the boxes and move the boxes back and forth when the shaft is rocked.

The construction and arrangement of the above described parts is old and well known, and forms no part of this invention which resides in the construction of a casting 18 forming the rear end of the magazine. This casting 18 is formed with a vertical wall 19 having flanges 20 to which the side plates 3 and 4 are bolted, and forms the end wall of the magazine. It is also formed with a chamber 21 extending laterally from the wall 19 and vprojecting beyond t-he edge thereof to which the arch plate is bolted. The inner side of said chamber is open into the space 7 between the arches and communi- Cates through a pocket 22, formed in the supporting frame 1 upon which the casting rests, with the air lue 9 beneath the coking plate, the ends of the angle bars 10 forming said flue, seating in said pocket. Air in the flue 9 is thus permitted to pass upward through the pocket'22 and chamber 21 into the space 7 between the arches.

The end wall of the throat of the magazine is formed by a casting 23 detachably secured to the casting 18 by means of a single bolt 24 and interlocking parts on the castings. The verticalwall 25 of the cast ing 23 forms a continuation of the wall 19 when the detachable casting is in place and the meeting edges of said walls are formed with interlocking flanges 26 to prevent the lateral movement of either wall relative to the other. The detachable casting is formed hollow or with a chamber 27 open at its lower end into the pocket 22 to receive air therefrom to cool the casting at its inner end or ycorner which is exposed to the greatest heat. A flange 28 extending laterally from the chambered end of the casting, overlaps an end wall or flange 29 on the casting 18 and the bolt 24 engages a hole in the flange 29 and a slot 30 extending inward from the edge of the flange 28. The bolt is held in place by a flange 31 on the wall 29 engaging the head of the bolt, and a nut on the outer end of the bolt securely holds the detachable Casting in place, the slot 30 facilitating the removal of t-he casting. A ledge 32 on the wall 29 projects over the upper end of the flange 28 to further assist in holding the detachable casting in place.

By making the casting which forms the end wall of the throat of the magazine, quickly detachable, easy access may be had to the rear end of the flue 9 and the pocket 22 so that said pocket and flue may be readily cleaned out. The wall 25 is exposed to a very high degree of heat and is liable to be burned out notwithstanding the fact that as ordinarily arranged, it is partially protected by a fire brick 33 set. in the end wall 311 of the furnace, and by making this wall a detachable casting which may be quickly and easily removed and replaced, repairs may be made at small expense and loss of time. Vhen the end wall of the throat of the magazine is made an integral part of the casting 18, this po-rtion warps and cracks owing to the unequal expansion of this projecting portion and the main part of the casting, as said projecting portion is subjected to much higher degree of heat than the main portion of the casting, and by making this throat portion of an independent part attached in the manner described, it may expand and contract without affecting the casting 18, there being suflicient play between the interlocking flanges to permit of such slight relative movement and it being held by a single bolt.

Obviously, changes may be made in the construction without departing from the spirit of the invention and I do not care to limit myself to the particular construction shown.

I claim as my invent-ion;

1. In an automatic stoker, the combination of a coking plate, an air flue extending beneath said plate longitudinally thereof, a magazine extending the length of said plate with its discharge throat above said plate and comprising an arch plate forming one side of the magazine provided with a seat for an arch and a member forming one end of the magazine having a chamber open at one side beneath the arch seat at the end of the coking plate and into which chamber the air flue opens, a chambered member interlocked with said member and having a vertical wall forming a closure for said opening at the end of the -coking plate, and means for holding the parts interlocked.

2. In an automatic stoker, the combination of a coking plate, an air flue extending longitudinally of and beneath said plate, a coal magazine having a thro-at at its lower end adjacent to said plate and comprising a member formed with a vertical wall forming the end wall of said magazine and with a chamber into which said air flue opens at the lower end thereof, said chamber having an opening in one side at the end of the coking plate, a chambered detachablemember having a vertical wall forming a closure for the opening into said chamber of the other member and forming a continuation of the end wall of the magazine at the end of the coking plate, interlocking members on the meeting edges of the vertical walls of said members, and a flange on the detachable member overlapping and detachably secured to the other member.

3. In an automatic stoker, the combination of a coking plate, an air ue extending longitudinally of and beneath said plate, a coal magazine having a throat at its lower end adjacent to said plate and comprising a member formed with a vertical wall forming the end wall of said magazine and with a chamber into which said air flue opens, said chamber having an open side at the end of the coking plate, a chambered member fo-rmed with a vertical wall forming a closure for the open side of the other member, and forming a continuation of the end wall of the magazine, lianges on the meeting vedges of the vertical walls of said members adapted to interlock, a laterally extending flange on the closure member overlapping the end wall of the chamber of the other member, and abolt engaging an opening in the flange and a slot in the adjacent wall.

In testimony whereof I aliix my signature in presence of two witnesses.

GEORGE IV. PHILLIP. Witnesses:

WM. BA'r'risoN, v S. A. CARR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

